--- gforth/engine/engine.c 2002/12/19 20:43:26 1.49 +++ gforth/engine/engine.c 2003/09/14 15:06:29 1.67 @@ -1,6 +1,6 @@ /* Gforth virtual machine (aka inner interpreter) - Copyright (C) 1995,1996,1997,1998,2000 Free Software Foundation, Inc. + Copyright (C) 1995,1996,1997,1998,2000,2003 Free Software Foundation, Inc. This file is part of Gforth. @@ -19,8 +19,6 @@ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA. */ -undefine(`symbols') - #include "config.h" #include "forth.h" #include @@ -61,28 +59,23 @@ undefine(`symbols') #include #endif +#ifdef HAS_FFCALL +#include +#include +#endif + #ifndef SEEK_SET /* should be defined in stdio.h, but some systems don't have it */ #define SEEK_SET 0 #endif -#define IOR(flag) ((flag)? -512-errno : 0) - -struct F83Name { - struct F83Name *next; /* the link field for old hands */ - char countetc; - char name[0]; -}; - -#define F83NAME_COUNT(np) ((np)->countetc & 0x1f) - -struct Longname { - struct Longname *next; /* the link field for old hands */ - Cell countetc; - char name[0]; -}; +#ifndef HAVE_FSEEKO +#define fseeko fseek +#endif -#define LONGNAME_COUNT(np) ((np)->countetc & (((~((UCell)0))<<3)>>3)) +#ifndef HAVE_FTELLO +#define ftello ftell +#endif #define NULLC '\0' @@ -168,7 +161,7 @@ extern int gforth_memcmp(const char * s1 # define CPU_DEP1 0 #endif -/* instructions containing these must be the last instruction of a +/* instructions containing SUPER_END must be the last instruction of a super-instruction (e.g., branches, EXECUTE, and other instructions ending the basic block). Instructions containing SET_IP get this automatically, so you usually don't have to write it. If you have @@ -182,6 +175,19 @@ extern int gforth_memcmp(const char * s1 #endif #define SUPER_CONTINUE +#ifdef GFORTH_DEBUGGING +#define NAME(string) { saved_ip=ip; asm(""); } +/* the asm here is to avoid reordering of following stuff above the + assignment; this is an old-style asm (no operands), and therefore + is treated like "asm volatile ..."; i.e., it prevents most + reorderings across itself. We want the assignment above first, + because the stack loads may already cause a stack underflow. */ +#elif DEBUG +# define NAME(string) fprintf(stderr,"%08lx depth=%3ld: "string"\n",(Cell)ip,sp0+3-sp); +#else +# define NAME(string) +#endif + #ifdef DEBUG #define CFA_TO_NAME(__cfa) \ Cell len, i; \ @@ -196,8 +202,41 @@ extern int gforth_memcmp(const char * s1 } #endif -define(enginerest, -`(Xt *ip0, Cell *sp0, Cell *rp0, Float *fp0, Address lp0) +#ifdef HAS_FFCALL +#define SAVE_REGS IF_spTOS(sp[0]=spTOS); IF_fpTOS(fp[0]=fpTOS); SP=sp; FP=fp; RP=rp; LP=lp; +#define REST_REGS sp=SP; fp=FP; rp=RP; lp=LP; IF_spTOS(spTOS=sp[0]); IF_fpTOS(fpTOS=fp[0]); +#endif + +#if !defined(ENGINE) +/* normal engine */ +#define VARIANT(v) (v) +#define JUMP(target) goto I_noop +#define LABEL(name) J_##name: asm(""); I_##name: + +#elif ENGINE==2 +/* variant with padding between VM instructions for finding out + cross-inst jumps (for dynamic code) */ +#define engine engine2 +#define VARIANT(v) (v) +#define JUMP(target) goto I_noop +#define LABEL(name) J_##name: SKIP16; I_##name: +#define IN_ENGINE2 + +#elif ENGINE==3 +/* variant with different immediate arguments for finding out + immediate arguments (for native code) */ +#define engine engine3 +#define VARIANT(v) ((v)^0xffffffff) +#define JUMP(target) goto K_lit +#define LABEL(name) J_##name: asm(""); I_##name: +#else +#error illegal ENGINE value +#endif /* ENGINE */ + +/* the asm(""); is there to get a stop compiled on Itanium */ +#define LABEL2(name) K_##name: asm(""); + +Label *engine(Xt *ip0, Cell *sp0, Cell *rp0, Float *fp0, Address lp0) /* executes code at ip, if ip!=NULL returns array of machine code labels (for use in a loader), if ip==NULL */ @@ -215,6 +254,15 @@ define(enginerest, #ifdef MORE_VARS MORE_VARS #endif +#ifdef HAS_FFCALL + av_alist alist; + extern va_alist clist; + float frv; + int irv; + double drv; + long long llrv; + void * prv; +#endif register Address up UPREG = UP; IF_spTOS(register Cell spTOS TOSREG;) IF_fpTOS(register Float fpTOS FTOSREG;) @@ -226,29 +274,17 @@ define(enginerest, static Label symbols[]= { #define MAX_SYMBOLS (sizeof(symbols)/sizeof(symbols[0])) #endif /* !defined(DOUBLY_INDIRECT) */ - (Label)&&docol, - (Label)&&docon, - (Label)&&dovar, - (Label)&&douser, - (Label)&&dodefer, - (Label)&&dofield, - (Label)&&dodoes, - /* the following entry is normally unused; - it is there because its index indicates a does-handler */ - CPU_DEP1, -#define INST_ADDR(name) (Label)&&I_##name +#define INST_ADDR(name) ((Label)&&I_##name) #include "prim_lab.i" #undef INST_ADDR - (Label)&&after_last, (Label)0, -#define INST_ADDR(name) (Label)&&K_##name +#define INST_ADDR(name) ((Label)&&K_##name) #include "prim_lab.i" #undef INST_ADDR -#ifdef IN_ENGINE2 -#define INST_ADDR(name) (Label)&&J_##name +#define INST_ADDR(name) ((Label)&&J_##name) #include "prim_lab.i" #undef INST_ADDR -#endif + (Label)&&after_last }; #ifdef CPU_DEP2 CPU_DEP2 @@ -275,7 +311,7 @@ define(enginerest, xts[i] = symbols[i] = (Label)routines[i]; for (; routines[i]!=0; i++) { if (i>=MAX_SYMBOLS) { - fprintf(stderr,"gforth-ditc: more than %d primitives\n",MAX_SYMBOLS); + fprintf(stderr,"gforth-ditc: more than %ld primitives\n",(long)MAX_SYMBOLS); exit(1); } xts[i] = symbols[i] = &routines[i]; @@ -298,199 +334,8 @@ define(enginerest, #ifdef CPU_DEP3 CPU_DEP3 #endif - - docol: - { -#ifdef NO_IP - *--rp = next_code; - goto **(Label *)PFA1(cfa); -#else -#ifdef DEBUG - { - CFA_TO_NAME(cfa); - fprintf(stderr,"%08lx: col: %08lx %.*s\n",(Cell)ip,(Cell)PFA1(cfa), - len,name); - } -#endif -#ifdef CISC_NEXT - /* this is the simple version */ - *--rp = (Cell)ip; - SET_IP((Xt *)PFA1(cfa)); - SUPER_END; - NEXT; -#else - /* this one is important, so we help the compiler optimizing */ - { - DEF_CA - rp[-1] = (Cell)ip; - SET_IP((Xt *)PFA1(cfa)); - SUPER_END; - NEXT_P1; - rp--; - NEXT_P2; - } -#endif -#endif - } - - docon: - { -#ifdef DEBUG - fprintf(stderr,"%08lx: con: %08lx\n",(Cell)ip,*(Cell*)PFA1(cfa)); -#endif -#ifdef USE_TOS - *sp-- = spTOS; - spTOS = *(Cell *)PFA1(cfa); -#else - *--sp = *(Cell *)PFA1(cfa); -#endif - } -#ifdef NO_IP - goto *next_code; -#else - NEXT_P0; - NEXT; -#endif - - dovar: - { -#ifdef DEBUG - fprintf(stderr,"%08lx: var: %08lx\n",(Cell)ip,(Cell)PFA1(cfa)); -#endif -#ifdef USE_TOS - *sp-- = spTOS; - spTOS = (Cell)PFA1(cfa); -#else - *--sp = (Cell)PFA1(cfa); -#endif - } -#ifdef NO_IP - goto *next_code; -#else - NEXT_P0; - NEXT; -#endif - - douser: - { -#ifdef DEBUG - fprintf(stderr,"%08lx: user: %08lx\n",(Cell)ip,(Cell)PFA1(cfa)); -#endif -#ifdef USE_TOS - *sp-- = spTOS; - spTOS = (Cell)(up+*(Cell*)PFA1(cfa)); -#else - *--sp = (Cell)(up+*(Cell*)PFA1(cfa)); -#endif - } -#ifdef NO_IP - goto *next_code; -#else - NEXT_P0; - NEXT; -#endif - - dodefer: - { -#ifdef DEBUG - fprintf(stderr,"%08lx: defer: %08lx\n",(Cell)ip,*(Cell*)PFA1(cfa)); -#endif - SUPER_END; - EXEC(*(Xt *)PFA1(cfa)); - } - dofield: - { -#ifdef DEBUG - fprintf(stderr,"%08lx: field: %08lx\n",(Cell)ip,(Cell)PFA1(cfa)); -#endif - spTOS += *(Cell*)PFA1(cfa); - } -#ifdef NO_IP - goto *next_code; -#else - NEXT_P0; - NEXT; -#endif - - dodoes: - /* this assumes the following structure: - defining-word: - - ... - DOES> - (possible padding) - possibly handler: jmp dodoes - (possible branch delay slot(s)) - Forth code after DOES> - - defined word: - - cfa: address of or jump to handler OR - address of or jump to dodoes, address of DOES-code - pfa: - - */ -#ifdef NO_IP - *--rp = next_code; - IF_spTOS(spTOS = sp[0]); - sp--; - spTOS = (Cell)PFA(cfa); - goto **(Label *)DOES_CODE1(cfa); -#else - { - /* fprintf(stderr, "Got CFA %08lx at doescode %08lx/%08lx: does: %08lx\n",cfa,(Cell)ip,(Cell)PFA(cfa),(Cell)DOES_CODE1(cfa));*/ -#ifdef DEBUG - fprintf(stderr,"%08lx/%08lx: does: %08lx\n",(Cell)ip,(Cell)PFA(cfa),(Cell)DOES_CODE1(cfa)); - fflush(stderr); -#endif - *--rp = (Cell)ip; - /* PFA1 might collide with DOES_CODE1 here, so we use PFA */ -#ifdef USE_TOS - *sp-- = spTOS; - spTOS = (Cell)PFA(cfa); -#else - *--sp = (Cell)PFA(cfa); -#endif - SET_IP(DOES_CODE1(cfa)); - SUPER_END; - /* fprintf(stderr,"TOS = %08lx, IP=%08lx\n", spTOS, IP);*/ - } - NEXT; -#endif - -#ifndef IN_ENGINE2 -#define LABEL(name) I_##name: -#else -#define LABEL(name) J_##name: asm(".skip 16"); I_##name: -#endif -#define LABEL2(name) K_##name: #include "prim.i" -#undef LABEL after_last: return (Label *)0; /*needed only to get the length of the last primitive */ -}' -) - -#define VARIANT(v) (v) -#define JUMP(target) goto I_noop - -Label *engine enginerest - -#ifndef NO_DYNAMIC - -#ifdef NO_IP -#undef VARIANT -#define VARIANT(v) ((v)^0xffffffff) -#undef JUMP -#define JUMP(target) goto K_lit -Label *engine3 enginerest -#endif - -#undef VARIANT -#define VARIANT(v) (v) -#undef JUMP -#define JUMP(target) goto I_noop -#define IN_ENGINE2 -Label *engine2 enginerest -#endif +}